title: [The discovery of three novel human viruses, human herpesviruses 6, 7, and 8].
abstract: Three novel human herpesviruses have been discovered in the last years: human herpesvirus 6 (HHV-6) in 1986, human herpesvirus 7 (HHV-7) in 1990, human herpesvirus 8 (HHV-8) in 1994. HHV-6 and HHV-7 were identified after their isolation from blood lymphocyte cultures, while HHV-8 was first detected by means of a specific molecular biology approach in the search for the etiologic agent of Kaposi's sarcoma. The three viruses infect lymphocytes, T-cells in the case of HHV-6 and HHV-7, B-cells in the case of HHV-8. Human infection with HHV-6 and HHV-7 is ubiquitous and widespread while HHV-8 infection seems to be more restricted, at least in Western countries. The propagation in cell culture in vitro can be done easily with HHV-6, with more difficulties in the case of HHV-7 and has not been completely obtained in the case of HHV-8. The polymerase chain reaction is the common method for the detection of these three viruses in human samples. The oncogenic role of HHV-6 and HHV-7 which were both classified in Betaherpesvirinae subfamily has not been convincingly demonstrated. HHV-8, classified as a member of Gammaherpesvirinae subfamily, is strongly associated with three lymphoproliferative diseases: Kaposi's sarcoma, Castleman's disease and primary effusion lymphomas.
authors.affiliation: Laboratoire de Virologie, CERVI, Groupe Hospitalier Pitié-Salpêtrière, Paris. henri.agut@psl.ap-hop-paris.fr
authors.forename: H
authors.initials: H
authors.lastname: Agut
authors.forename: V
authors.initials: V
authors.lastname: Calvez
authors.forename: A M
authors.initials: AM
authors.lastname: Fillet
authors.forename: J M
authors.initials: JM
authors.lastname: Huraux
mesh_terms: D006566:Herpesviridae Infections / Q000175:diagnosis / Q000453:epidemiology / Q000628:therapy; D015654:Herpesvirus 6, Human / Q000302:isolation & purification*; D016199:Herpesvirus 7, Human / Q000302:isolation & purification*; D019288:Herpesvirus 8, Human / Q000302:isolation & purification*; D006801:Humans
vernacular_title: La découverte de trois nouveaux virus humains, les herpèsvirus humains 6, 7 et 8.